| Eksisterende Skulder Behandlingsmetoder
vs. HemiCAP™
Marrow Stimulation
Techniques
"Abrasion arthroplasty"
In abrasion arthroplasty, a high-speed rotary burr or shaving
device is used to remove about 1mm of bone from the surface
of the lesion. This creates an exposed bone bed that will
bleed and this will initiate a fibro-cartilage healing response.
The fibro-cartilage then grows into and fills the hole or
lesion creating a new but inferior surface. This technique
can provide short-term (1-3 years) pain relief, but often
patients are unable to resume their desired activity levels.
"Microfacture/Microdrilling
Technique."
This technique is very similar to abrasion arthroplasty except
that the bleeding is initiated by impacting awls, picks or
drilling directly into the bone within the lesion. This procedure
is more commonly performed in the knee.
Total Shoulder Replacement
The shoulder was the first human joint to be replaced with
a prosthesis. The modern era of shoulder replacement dawns
with the pioneering work of Dr. Charles S. Neer II. In 1953,
he devised a hemiarthroplasty prosthesis for fractures of
the humeral neck. Since then a number of designs emerged in
both Europe and the United States to address the problem of
the absent rotator cuff. Most were subsequently abandoned
as these prostheses had a similar fate, usually due to loosening.
The disappointing results of these designs led to a generally
held view of the lack of success of shoulder replacement and
rekindled an interest in alternative methods of treatment.
An enormous number of designs, sometimes radically different,
have appeared such as bipolar prostheses, surface replacements,
components made from other biomaterials and most recently
modular components. A key factor in any design is the importance
of recreating the anatomy. The anatomy of the proximal humerus
is complex. Designs to recreate this anatomy have been developed
along with an alternative solution, which is the surface replacement.
The most commonly used surface replacement of this type is
the Copeland.
Today, older patients can expect reliable and good relief
of pain, and restoration of function with either a hemiarthroplasty
or total shoulder replacement. In younger patients, treatments
are limited to a resurfacing prosthesis such as the Copeland
and hemiarthroplasty may be preferred to a total shoulder.
The glenoid replacement remains a significant problem and
the surgical community continues to look to resurfacing technology
that can restore normal humeral head anatomy without compromising
future joint replacement.
Hemi Replacement
Hemiarthroplasty is the replacement of only one articular
surface of a joint, usually the ball or convex side, which
means only a small amount of diseased tissue is being removed.
The HemiCAP™ implant is a rounded, cap-like implant
made from a cobalt chrome alloy with a central post on the
implanted, or bone side. Cobalt chrome is a material that
has been used in total joint reconstruction devices for over
two decades. This has proven to provide a safe, effective
and strong weight-bearing surface in joints. The CAP™
system precisely aligns the surface of the implant to the
contours of the patient's articular cartilage surface, thus
filling the defect and restores a smooth and continuous articulating
surface.
Arthrosurface believes that the HemiCAP™ implant will
offer the following clinical advantages:
-
Relief from current pain and swelling
-
Return to normal activity with rapid recovery time
-
Restoration of a smooth, continuous, articulating load-bearing
surface.
-
A simple and reproducible outpatient/ambulatory surgical
procedure
For more information on the Arthrosurface
HemiCAP concept such as brochures, articles, video etc., please
contact Ortotech
directly.
 
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